V120ZS20PX10

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TVS - Varistors, MOVs

The V120ZS20PX10 is a surface mount over-voltage protection device, designed to protect sensitive electronic components from static discharges in telecommunications, computers, industrial control systems, and other sensitive electronic equipment. It is designed as an over-voltage transorb, containing both an avalanche diode and a metal oxide varistor (MOV).

Varistors are voltage-dependent resistors designed to protect against over-voltage surges. They are constructed of two electrodes, with a sensitive semiconductor material, such as zinc oxide, between them. The varistor has a very high (inversely proportional) dynamic resistance when idle, but drops rapidly as the voltage across it increases. This allows them to absorb large over-voltage surges with minimal energy loss. A varistor will dissipate energy if it is subjected to a sustained voltage over its rated voltage (Vmax), but will return to its non-conducting state when the voltage drops back to normal operating levels. The V120ZS20PX10 can handle a maximum peak surge pulse of up to 1KV.

MOVs (Metal-Oxide Varistors) are similar to varistors, but are constructed with a combination of metal and oxide layers, as opposed to an organic semiconductor material. MOVs have the same voltage-dependent resistive characteristics, but instead of dissipating the energy, they redirect and disperse it in a manner that does not cause damage to the device. As the voltage across an MOV increases, so does its current creating an arc-like discharge, thus dispersing the energy stored in the device. The V120ZS20PX10 has a maximum non-destructive clamp point of 18V.

Applications of this device range from telecom, to medical device protection, to industrial control systems. Because of its low leakage current and its low capacitance it can be used to protect sensitive equipment from static discharges without causing disruption or damage. The device is also UL recognized and meets the requirements of the International Protection Class IEC 60950-1.

In summary, the V120ZS20PX10 is a robust, reliable device designed to protect sensitive electronic components from the effects of over-voltage surges. It provides superior protection from static discharges while maintaining a low capacitance and leakage current.

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